/*
 *    Thing Game Library
 *   Copyright (C)2005 - 2010 Eduardo Nunes Pereira (eduardonunesp at gmail dot com)
 *
 *   This program/library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 *   This program/library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 *    You should have received a copy of the GNU Lesser General Public
 * License along with this program/library ; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef __MUTEX_HPP__
#define __MUTEX_HPP__

#include <SDL_thread.h>
#include "logger.hpp"

class Mutex
{
public:
    Mutex();
    ~Mutex();

    void lock();
    void unlock();

private:
    Mutex(const Mutex&);  // prevent copying
    Mutex& operator=(const Mutex&);

    SDL_mutex *_mutex;
};

class MutexLocker
{
public:
    MutexLocker(Mutex *mutex);
    ~MutexLocker();

private:
    Mutex *_mutex;
};


inline Mutex::Mutex()
{
    _mutex = SDL_CreateMutex();
}

inline Mutex::~Mutex()
{
    SDL_DestroyMutex(_mutex);
}

inline void Mutex::lock()
{
    if (SDL_mutexP(_mutex) == -1)
        Logger::getInstance()->log("Mutex locking failed: %s", SDL_GetError());
}

inline void Mutex::unlock()
{
    if (SDL_mutexV(_mutex) == -1)
        Logger::getInstance()->log("Mutex unlocking failed: %s", SDL_GetError());
}

inline MutexLocker::MutexLocker(Mutex *mutex):
    _mutex(mutex)
{
    _mutex->lock();
}

inline MutexLocker::~MutexLocker()
{
    _mutex->unlock();
}

#endif
